Portable road mark paint drying machines



April 1, 1969 J. c. DRAKE 3,435,318

\ PORTABLE ROAD MARK PAINT DRYING MACHINES Filed Aug. 9, 1967 Sheet 7 of3 INVENTOR. James C. Drake ATTORNEY Y April 1, 1969 J. c. DRAKE PORTABLEROAD MARK PAINT DRYING MACHINES Filed Aug. 9. 1967 Sheet JIIIIIIIIJ'IJJJINVENTOR. James C. Drake ATTORNEY April 1, 1969 J. c. DRAKE PORTABLEROAD MARK PAINT DRYING MACHINES Filed Aug. 9, 1967 Sheet 3 ms Fig. 7

Fig. 9

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INVENTOR. "James G. Drake ATTORNEY United States Patent 3,435,818PORTABLE ROAD MARK PAINT DRYING MACHINES James C. Drake, Grand Junction,Colo., assignor of Ewenty percent to Wilbur A. E. Mitchell, Greeley,

Filed Aug. 9, 1967, Ser. No. 663,916 Int. Cl. F23c 5/00 US. Cl.126-271.2 6 Claims ABSTRACT OF THE DISCLOSURE A highway paint markdrying machine including a hot air blast furnace. An adjustable pipeextension is connected to the furnace. The outlet end of the pipeextension is provided with a horizontally rotatable register member. Theregister member further includes pivotally adjustable vane members.

This invention relates to portable paint drying machines for dryingfreshly painted highway marking strips or lines.

Modern highways have painted center lines, as well as so-called doubleno-passing center lines, outer edge marker lines and other paintedmarkings, which are usually painted by mobile painting machines directlyonto the highway surface. Said painting machines are capable of applyinga painted strip along the highway while moving at a speed ofapproximately three to five miles per hour. Depending upon the time ofyear and weather conditions, it normally takes from twenty minutes toforty-five minutes for such freshly painted highway marking to set ordry sufficiently to permit moving traffic to run thereon withoutsmearing or ruining same. It has, therefore, heretofore been necessaryto run at least a three man crewone operating the driven paintingmachine, another driving the truck pulling that machine, and a third manoperating another truck carrying a load of suitable fresh paint warningsigns, and to place those signs along the newly applied highway marking,and proceeding rearwardly from time to time to pick up those signs wherethe paint has set sufficiently to allow moving trafiic thereon. Suchwarning signs are usually applied about every 100 yards or so along thenewly applied highway markings. The matter of the placing and removingof those warning signs results in many man hours of labor. To overcomethat man hour inefficiency and expense, in the placing and removing ofthose temporary warning signs, I have developed my novel, portable,highway-paint-strip drying machine.

With the use of my novel, portable, paint-drying machine, which followsimmediately behind the mobile painting machine and over the freshlypainted highway mar-king strip, the freshly painted strip is therebydried or set sufiiciently that it can be driven over by moving trailicpractically immediately, thus making it unnecessary to place and removethe many temporary wet paint warning signs, and thereby accomplishing agreat saving in man hours of labor.

I have perfected a novel, portable, paint-drying machine capable ofmoving as rapidly along the freshly applied highway marking as themobile painting machine, which applies said markings, at a speed ofapproximately three to five miles per hour. To accomplish that drying ofthe newly painted highway marking strip I have developed a novel dryingmachine delivering a strong blast of high degree exhaust air from aportable, propane burner, furnace "ice unit, directing that hot airblast onto the freshly painted strip by a large blower pipe exhaust portend and passing the blast directly onto and over the freshly paintedstrip, as the unit is moved forwardly along and over that painted strip.

It is, therefore, a principal object of my invention, in such a machineto provide a portable, high-pressure, propane furnace, adapted to betransported on a truck, and having a power driven fan adapted to suckthe heated blast of exhaust air directly from that furnace and into anadjustable exhaust pipe, adapted to adjustably direct that hot air blastonto the freshly painted strip as the truck moves forwardly over andalong that painted strip.

Another principal object of my invention is the provision of a novel,adjustable, hot-air, exhaust pipe, in combination with such a portabledrying machine furnace unit, and having a novel, adjustable, horizontal,outlet register at the oven-like, housing, discharge end of the exhaustpipe, adapted for adjustably, rotatably, and in a horizontal arcdirecting that blast of heated air onto such freshly painted highwaymar-king or strip, while that discharge end of the exhaust pipe passesclose to and over the freshly painted marking.

A further object of my invention is the provision of a novel,horizontally rotatable, movable, diametrically variable, adjustablegrill or set of register vanes, at the discharge end of my novel,hot-air blast, exhaust pipe, so as to be able to adjustably direct thatblast of hot air onto the freshly painted road surface marking or strip,aaginst any different wind condition, from time to time.

Other and further objects will be apparent to those skilled in the art.

FIGURE 1 is an elevational view of my novel paint strip drying machine,mounted on the flatbed of a suitable truck.

FIGURE 2 is an enlarged end view of the front end of the furnace,looking in the direction of the arrow 2 of FIGURE 4.

FIGURE 3 is an end view of the rear of the furnace, looking in thedirection of the arrow 3 of FIGURE 4.

FIGURE 4 is an enlarged, partial, vertical, longitudinal,cross-sectional view of the furnace portion of my portable highway paintdrying machine.

FIGURE 5 is an enlarged rear view of the novel discharge end of my hotair exhaust pipe of my paint drying machine.

FIGURE 6 is a reduced diagrammatical view, illustrative of one meansused to raise and lower my hot air exhaust pipe and also to vary thehorizontal positioning of the discharge end thereof.

FIGURE 7 is an enlarged, vertical, cross-sectional view taken on theline 7-7 of FIGURE 5, being of the discharge end of my hot air blastpipe 3-6.

FIGURE 8 is a horizontal, sectional view, looking downwardly in thedirection of the arrow 5 and on the line 8-8 of FIGURE 5, showing mynovel adjustable register 57 of that discharge end of the pipe 36.

FIGURE 9 is an elevational view of my novel, rotatably adjustable andadjustable to the vertical, grill member or vanes 57.

FIGURE 10 is a reduced side view of the discharge end of my hot airexhaust pipe 36.

In the drawings, similar characters of reference indicate correspondingparts in the several views.

On a suitable motor tmck, such as a 2 /2 ton chassis,

10, having a flat bed, 11 I secure an insulated, fire-clay lined highpressure propane hot air blast furnace 12, adapted to burn high pressurepropane fuel supplied from a suitable storage tank, 13, carried on thetruck. I provide the heater furnace, 12, as a large elongated fire boxenclosure with its outer surface insulated, with a conventional propanefuel burner head, 14, suitably connected to burn high pressure propanefuel from the supply tank, 13.

It will be understood that the burner 14 has an adjustable,conventional, air intake opening, 15. The front end of the furnace tank12 is otherwise closed at that end, except for a secondary air intakeopening, 19, adapted to supply the high pressure fuel primary mixturewith a large quantity of secondary air for a suitable, ultimate,combustion mixture, commensurate with the draft of the exhaust suctionfan pulling the heated exhaust air out of the other end of the furnacedirectly from the fire chamber. I provide a secondary air opening as asegmented opening, 19, as shown in FIGURE 2, and a suitable, pivoted,adjustable, segment-shutter, 16, as shown, and as will be understood.The outer, rounded, peripheral edge of the shutter, 16, is functionallyadapted for manual sliding thereof within a peripheral groove providedfor that purpose on that end of the furnace by a pivoting of 16 on itspivot 17. It will be seen that shutter 16 may be moved or swung on 17,to provide a suitably sized secondary air intake opening between itsedge 16a and the exposed segmental edge of the secondary intake opening19. An outlet, 20, for heated air to leave the furnace is provided atthe furnaces far end. To prevent the fuel mixture combustion flame frombeing drawn directly into the exhaust outlet suction fan at thatopening, 20, I provide a plurality of suitable fire resistant baffles,21, 22 and 23, spacedly positioned and held within my furnace, as shownand as will be understood.

The exhaust draft fan, 30, is a conventional, squirrelcage type fansuitably mounted in a fan housing 31, operated by a motor 32 and pulley33. The fan 30 is adapted to suck hot exhaust air into its center fromthe side thereof, at furnace exhaust port 20, and to force such hot airout its periphery into pipe 36, in a conventional manner. The fanhousing 31 is a complete enclosure, except for the intake opening, 34,on its one side in pipe connection with outlet 20 of the furnace, andexcept for outlet opening 35 to which a hot air discharge pipe 36 issecured. A suitable pipe connects the said openings 20 and 34. It willbe seen that the blast of hot exhaust air created by the burning of highpressure propane fuel, accentuated by the suction of the fan 30, will bedrawn directly out the pipe 36.

I construct the hot air exhaust pipe, 36, of suitable, conventional,telescoping sections 37, 38, 39 and 40, adapted to be conventionallyadjustable vertically and horizontally. A conventional means is used foreffecting a manual raising or lowering adjustment of the outer end ofpipe 36, and a positioning of its discharge end 50 in a horizontalplane, to effect various adjustments of the position of that dischargeend 50 of the pipe 36, as may be needed and as will be understood fromthe diagrammatical view of FIGURE 6.

I provide the discharge end, 50, of the exhaust pipe 36 with a flared,inverted, funnel-like, oven-housing extension 51 thereof, as illustratedin FIGURES 1, 5, 7 and 10. A pair of diametrically positioned wheels,52, on stub shafts, 53, are suitably secured to each side of thehousing, 51, to hold and guide the lower, open end of that housing 51 inclose positioning to the road surface, 54, with the weight of the piperiding on those wheels. It will be understood that those wheels can havetheir stub shafts, 53, adjustable vertically on the extension of thedrum 51, in a conventional manner, although such adjustability of thewheels is not shown, so as to be able to vary the distance between thelower edge 56 of the ovenhousing, 51, and the freshly painted highwaystrip 55 on the highway surface, as may be desired.

During the use of my paint drying machine while moving along thehighway, quite often wind is a terrific problem. To prevent a prevailingwind from deflecting the blast of hot air from the discharge end 56 ofmy hot air exhaust pipe 36 away from the freshly painted highway stripas my machine passes thereover, I provide the novel, flared, oven-likehousing extension 51, at the end of my exhaust pipe 36. Within the novelhousing 31 I provide a novel combination of a multiply adjustable,horizontally rotatable register, having vane blades which are in turnalso adjustable, so as to be able to vary and control the direction ofthe hot air blast leaving that exhaust pipe. I provide for normalangular variation of the vane blades, 74, of the grill or register, 57,within an arc of about 140 degrees, or being about 70 degrees on eachside from the vertical thereof, and also at the same time for horizontalrotation of the entire grill or register 57 in a horizontal arc of aboutdegrees, or about 50 degrees on each side of the direction of travel ofmy paint drying machine; comprising my novel means for controlling thedirection of the hot air blast leaving that end 56 of my exhaust pipe36. I provide for reversibility of those blades, 74, from the vertical,at the same time as providing for the rotation of the grill 57 withinthe housing 51 on shoulder 58, which amounts substantially to totaladjustability of the direction of the hot air blast leaving the lowerend, 56, of my exhaust pipe 36, in substantially a 270 degree horizontalarc, to meet any given wind obstacle or condition, as will be furtherexplained.

I provide a novel combination, with my housing 51, of a round,horizontally and manually rotatable, register member 57, being a meansfor controlling the direction of the hot air blast .from theoven-housing. That register is in the form of a variably positionedring, 57, resting on and adapted to be carried loosely by, and formanual horizontal rotation within, the shoulder 58, formed for thatpurpose on the inner periphery of the lower inner portion of the roundoven-housing 51, as shown in FIG- URES 7 and 8. The register-ring 57 isdesigned to be frictionally rotated horizontally or positioned radiallyon the shoulder 58, as will be explained.

In and to my rotatable disc register, 57, I rotatably mount a pluralityof aligned, flat, directional deflector vanes or blades, 74, by suitablhorizontally positioning and pivoting each vane at opposite sidesthereof and to the disc register. I mount each vane by a loose pivotprojection thereof, and by suitably journalling same at 75, into asuitable loose bearing connection, and carried internally of my ring 57as illustrated. To be able to control the pivotal adjustment of allthose vanes 74 in. unison I provide horizontally slidable control barmeans, 72, of the design illustrated, loosely carried in a verticalslot, 70, provided in the upper edge of the ring 57, as shown. A portionof that flat collar ring 57, on each side of the slot 70, is extended ormade wider, with that extra width indicated as collar extension 59, forreasons to be explained. The end of the slidable control bar 72 oppositethe slot 70 is slidably held between spacer plates 71 secured to theinside of the ring 57, as shown, and with the control bar 72 restingloosely on top of the aligned vanes 74. It will be seen that the bar 72is adapted to simultaneously control the relative slant, or angle fromthe vertical, of each pivotally movable vane 74, and to accomplish thatI provide a plurality of suitably spaced notches, 76, on the lower edgeof the bar 72, with each notch positioned and adapted to fit looselyover and receive therein an ad jacent upper edge of one of the spacedvanes, 74.

A plurality of spaced notches 73 are also provided on the lower edge ofthe control bar 72, adjacent its end extending through slot 70, of asize and position adapted for any one thereof to encompass and rest onthe lower edge of the slot 70. The weight of the bar 72 causesengagement of notch 73 with slot 70s lower edge, and comprises gravitylatch means for holding the control bar 72 in any one of a number ofhorizontal positions extending between the plates 71 and the slot 70, as72 rests on top of the vanes 74, for in turn holding said vanes 74 inany desired pivotal angle of each to the vertical. The notches 76 in thelower edge of the bar 72 are equidistant apart. An inner stop member,78, projecting from the side of the bar 72, positioned a relativelyshort distance from the inner periphery of the ring 57, as shown inFIGURE 9, is provided to prevent a withdrawal of the bar 72 through slot70 to the left as illustrated, and to prevent disengagement of the upperedges of the vanes 74 from those notches 76 of the bar 72. Control bar72 is of a suflicient length to extend a short distance beyond the outerperiphery of the ring 57 when it is moved as far as possible to theright, as viewed in full lines of FIGURE 7. The outer end of bar 72 isflared at 72a to form a right angular upstanding handle and outer stopextension. Bar 72 is of such a length that when its handle 72a is movedtoward or into close contact with the outer periphery of the ring 57,and its outer notch 73 then latch engages the lower edge of the slot 70,the other end of the control bar 72 is then in close proximity to theend plate 57a extending across guide plates 71, and the vanes 74 areheld parallel by the control bar 72 in their extreme pivotal position tothe right, as shown in full lines of FIGURE 7. It will be understoodthat further positioning of bar 72 to the right, and resultant angularpositioning thereby of the vanes 74 with their tops to the right,farther than as shown, could be designed if necessary.

Conversely, when the control bar 72 is pulled into the position shown inthe dotted lines of FIGURE 7, then the sliding movement of the controlbar in that direction is limited by the stop 78 thereof abutting theinside of the ring 57, and the inner latch notch, 73, then engages thelower edge of the slot 70, and the vanes 74 are then in turn heldpivotally in the other extreme pivotal position by the control bar 72,as shown in the dotted lines of that view. It will be seen that anyother pivotal adjustments or positions of the vanes by that control bar72 may be made by a sliding movement of that bar 72 and positioning ofany desired notch 73 thereof on the lower edge of slot 70, as desired.

My register ring, 57, is horizontally rotatable substantially 120degrees of a 360 degree circle, as indicated by the arrows E, and thevanes 74 of that register ring 57 are also adjustable in unison bycontrol bar 72 into any desired slant or angular position from thevertical anywhere within a maximum of about 70 degrees on each side fromthe vertical, at the same time.

It will be seen, therefore, that my just described novel adjustabilityof the register 57 and its vanes 74 amount to means for adjusting thehot air blast directional control by that register and its vanesthroughout substantially a 240 degree horizontal arc, as indicated bythe dotted line are E of FIGURE 8, and since each angular position ofthe vanes are adjustably positionable on each side of and from thevertical, at the same time as the register is so rotatable. By beingable to thereby control the direction of the hot air blast leaving theexhaust pipe through the oven-like housing 51, by my said means foradjusting the register and its vanes, that blast of hot air can bedirected into the direction of the prevailing wind, and, as a result, mymachine is capable of being used along the highway at maximumefi'iciency, regardless of the direction of the prevailing wind and ininclement weather.

For example, with reference to FIGURE 7, when there is a rearward ortail wind, indicated as A of FIGURE 7, following the direction of travelof the machine as the paint drying machine is being used along thehighway, then the control bar 72 is placed into the position illustratedin the full lines thereof (of FIGURE 7) so that the hot air blastleaving the under side of 51 will be directed by those vanes 74 againstor into that wind, as illustrated by the full line arrows, A of FIGURE7, in order to cause the hot air to be blown against that wind for mostefficient use of that hot air blast in drying the freshly appliedpainted strip, thus preventing the greater part of the hot air blastfrom being carried away by the wind. Conversely, if the wind is comingfrom the opposite direction, indicated as B of FIGURE 7, an oppositeadjustment of the vanes 74 by the bar 72 will be made as shown in thedotted lines of FIGURE 7, to result in a direction forcing thereby ofthe hot air blast against that wind to effect the maximum dryingefliciency by my machine.

As to the operation of the control bar 72 by the worker operating thepaint drying machine, the operator manually lifts the control bar 72 byits handle end 72a, sulficiently to disengage the notch 73 fromengagement with the lower edge of slot 70. Then the bar 72 is pushed orpulled, as may be desired, to thereby cause the vanes 74 to be slantedinto the desired directional slant positioning from vertical, on eitherside of the vertical, as the case may be and as will be understood fromthe above explanation. Then the handle 72a is lowered until a desirednew notch 73 engages the lower edge of slot 70, for thereby holding thecontrol bar 72 in the desired new position. At any time, independent ofthat adjustment by the control bar 72 of the slant of the vanes 74, theentire register ring 57 may be manually rotated by pressure sideways onthe handle 72a thereof, thus moving the ring 57, on the shoulder 58 ofthe oven housing 51, into any position desired within the innerperiphery of the shoulder 58. Ring 57 is of sufficient weight and sizeto be frictionally held in any horizontal position within the innerperiphery of the housing 51 on the shoulder 58 thereof. The control bar72 and its handle end 72a fit frictionally, yet slidably, within thatopening 79, as shown in FIG- URE 5. The length of that slot 79 controlsthe extent of the adjustment or horizontal positioning of the ring 57,as explained, and which I preferably make about degrees. Collarextension, indicated as 59, of the ring 57, is obviously designed toprevent the hot air of the pipe 36 from escaping out the slot 79, duringuse and horizontal positioning of bar 72 by the handle 72a therebysideways within the slot 79, as will be understood.

Having thus fully shown, explained and disclosed the preferredembodiment of my invention, it is to be understood that many changes andmodifications therein may be made within the scope, spirit and teachingthereof, and therefore, I wish to be bound only by and within the scopeof the hereunto appended claims.

What I claim and desire to secure by Letters Patent is:

1. A portable paint drying machine for drying freshly painted highwaymarkings at it is moved thereover, comprising a hot air heater furnacemeans, mounting means on the furnace means for securing same to and as apart of a motor vehicle, a fuel storage supply means as a part of thevehicle, a fuel burner means at one end of the furnace, fuel supplyconnection means between the fuel storage means and the burner means, acombustion exhaust port at the other end of the furnace, a flame bafileplate midway of the furnace interior, a fan housing enclosure inextension of the exhaust port, a flexible hot air discharge pipeextending from said fan housing enclosure, a power blower fan means inthe fan housing being 'adapted to suck the combustion exhaust and hotair directly from the furnace exhaust port and force it into the hot airdischarge pipe, power means on the vehicle for operating said blowerfan, an inverted funnel-like oven extension means at the dischargeextremity of the hot air discharge pipe, a frictionally mounted androtatably adjustable outlet register member carried by the dischargeextremity of the pipe, means on the vehicle for carrying said hot airdischarge pipe thereby and being adapted for a manual adjusting of theposition of its oven discharge extremity with relation to the freshlypainted marking on the highway surface, manually pivotally frictionallyadjustable air vane means in and carried by the rotatable outletregister member of the oven extension of the hot air discharge pipe forvarying the direction of discharge of the furnace exhaust hot air fromthat pipe, and means on the register for so mounting the vanes, andmeans on the oven extension for so rotatably mounting the register.

2. A paint drying machine for drying freshly painted highway markings asit is moved thereover, comprising a hot air heater furnace means,mounting means on the furance means for securing same to and as a partof a motor vehicle, a fuel storage supply means as a part of thevehicle, a fuel burner means at one end of the furnace, fuel supplyconnection means between the fuel storage means and the burner means, acombustion exhaust port at the other end of the furnace, a flame baffleplate midway of the furnace interior, a fan housing enclosure intergralwith the exhaust port, a flexible hot air discharge pipe extending fromsaid fan housing enclosure, a power blower fan means in the fan housingbeing adapted to suck the heated burner combustion exhaust directly fromthe furnace exhaust port and force it into the hot air discharge pipe,power means on the vehicle for operating said blower fan, an invertedfunnel-like oven extension means at the discharge extremity of the hotair discharge pipe, means on the vehicle for carrying said hot airdischarge pipe thereby and being adapted for a manual adjusting of theposition of its oven discharge extremity with relation to the freshlypainted marking on the highway surface, a plurality of manuallyadjustable air vane means in and frictionally carried by the ovenextension of the hot air discharge pipe for varying the direction ofdischarge of the furnace exhaust hot air from that pipe, and means forso frictionally mounting said vanes, said air vane means comprising ahorizontally rotatable disc register means frictionally carried withinsaid oven extension end of the hot air discharge pipe, means carried bysaid discharge pipe for so frictionally mounting the register meanstherein, said disc register means having the plurality of pivotallymounted air vane blade means carried thereby and adapted for manualadjustment of each substantially into any position within 70 degreesfrom each side of the vertical, means for so pivotally mounting andcarrying said vane means within and by said disc register means, andmanually operable latch and control means carried by and Within the ovenextension for effecting such positional separate adjustments of theregister on the one hand and also of its vane blade means on the otherhand.

3. In a motor vehicle having a body floor, a highway paint dryingmachine comprising, a blast furnace means mounted on said vehicle floor,means on the furnace for so mounting the furnace to the vehicle floor, afuel storage supply means as a part of the vehicle, a fuel burner meansat one end of the furnace, fuel supply connection means between the fuelstorage means and the burner means, a combustion exhaust port at theother end of the furnace means, a baffle plate midway of the furnaceinterior, a fan housing enclosure in extension of the furnace meansexhaust port, a flexible hot air discharge pipe extending from said fanhousing enclosure, a power blower fan means in the fan housing beingadapted to suck the furnace combustion exhaust air directly from thefurnace means exhaust port and force it into the hot air discharge pipe,power means on the vehicle for operating said blower fan, an inverted,funnel-like, oven extension means at the discharge extremity of the hotair discharge pipe, means on the vehicle for carrying said hot airdischarge pipe thereby and being adapted for a manual adjusting of theposition of its oven dischange extremity with relation to the surface ofthe ground, manually adjustable pivotal air vane means in andfrictionally carried by the oven extension of the hot air discharge pipefor varying the direction of discharge of the furnace exhaust hot airfrom that pipe, and means for so frictionally mounting said vane means,and including an adjustably rotatable horizontal register member meanscarried by said oven extension of the hot air discharge pipe.

4. In combination, a motor vehicle having a body floor, a highway strippaint drying machine comprising a blast furnace mounted on said vehiclefloor, means on the furnace for so mounting the furnace to the vehiclefloor, a fuel storage supply tank carried by the vehicle, a fuel burnermeans at one end of the furnace, fuel supply connection means betweenthe fuel storage tank and the burner means, a combustion exhaust port atthe other end of the furnace, a flame baffle plate midway of the furnaceinterior, a fan housing enclosure as a part of the furnace exhaust port,a flexible hot air discharge pipe extending from said fan housingenclosure, a power blower fan means in the fan housing being adapted tosuck the burner exhaust air directly from the furnace and force it intothe hot air discharge pipe, power means on the vehicle for operatingsaid blower fan, an inverted funnel-like oven extension means at thedischarge extremity of the hot air discharge pipe, means on the vehiclefor carrying said hot air discharge pipe thereby and being adapted for amanual adjusting of the position of its oven discharge extremity withrelation to the surface of the ground and with relation to the paintedstrip being dried by the machine, a plurality of manually,simultaneously adjustable, pivotally mounted, air vane blade means inand frictionally carried by the oven extension of the hot air dischargepipe for varying the direction of discharge of the furnace exhaust hotair from that oven end of the discharge pipe, and means comprisingsubstantially a horizontal are rotatable disc register meansfrictionally held and carried within said oven extension end of the hotair pipe, means on the discharge pipe for so frictionally mounting theregister means in the oven extension means, said disc register meanscarrying said plurality of pivotally mounted air vane blade means, eachblade means being manually adjustable substantially in any position to70 degrees from each side of the vertical, said blades having a manuallyoperable latch-control-means carried by and within the oven extensionfor so adjusting the position of the vane blades into any angularposition thereof with relation to the vertical.

5. The combination with a highway paint mark drying machine having a hotair blast furnace, an adjustable pipe extension for directing furnaceexhaust hot air therefrom onto the freshly painted mark and a power fanfor drawing the exhaust hot air into the pipe extension as the machineis drawn along said fresh paint, of a horizontally rotatablefrictionally mounted round hot air discharge register member means inthe discharge end of the pipe, adapted for controlling the direction ofthe hot exhaust air blast therefrom onto the freshly painted mark, saidregister having pivotally adjustable vane means carried thereby, manualmeans for effecting rotation of said register member means, and separatemanual means for effecting pivotal adjustment of said vane means, saidregister means being adapted for rotation in any are position thereofwithin substantially fifty degrees of either side of a given radiusthereof.

6. The combination with a moveable paint drying road machine having ahot air heater unit, an adjustable hot air discharge pipe extendingtherefrom and having a discharge end horizontally wheeled-supported aspaced distance on and from the surface of the road on which the machineis moved and having a horizontal open end thereof, and a blower fan insaid pipe for forcing the hot air therefrom, of a multiply adjustablehorizontally rotatable and positioned hot air register frictionallycarried by and in the discharge pipe at its open end and adapted forcontrolling the direction of the hot air forced from the register atthat end, means for so adjustably horizontally rotatably carrying theregister at said discharge pipe open end for horizontally rotatablyadjusting the register to any position substantially within degrees oneither side of the direction of movement of the machine, a

both and adapted for so horizontally rotatably adjusting 5 the registerand also being adapted for effecting a pivotal adjustment of the angleof a vane air deflector blade means and including an operable latchcontrol means and being operably loose-bearing pivotally connected withposition within 70 degrees from each side of the vertical of said blademeans upon operable bar means movement.

References Cited UNITED STATES PATENTS 805,337 11/1905 Blake et a1.3,034,498 5/1962 Gill um 126-2712 3,136,488 6/1964 Petlak et al.

the deflector blade means to effect a pivoting into any 10 CHARLES J.MYHRE, Primary Examiner.

